Engineering Enterprises Inc.

Denver K Kimberlin

A downhole bladder pump for pumping ligher-than-water liquids. The pump includes an outer tube closed at its bottom and top, but having slots adjacent its upper end to admit the liquid to be pumped. Positioned concentrically within the outer tube is a cylindrical bladder chamber. A cylindrical bladder is mounted within the bladder chamber and registers with the internal surface of such chamber. A cyclically-operated pneumatic control system periodically delivers pressurized air to the space between the bladder and the bladder chamber to collapse the bladder and pump liquid which has flowed into the bladder. At other times during the cycle, the control system draws the bladder outwardly against the internal surface of the bladder housing by the application of vacuum. The liquid to be pumped is then forced into the bladder through a check valve subassembly positioned in the lower end of the bladder housing. This liquid is next expressed or discharged through an upper check valve system located in the upper end of the bladder housing.

Bladder pump assembly

A circuit for controlling a pump for pumping a column of gasoline floating on a column of water. A first probe is positioned at the level of the pump intake and a second probe is positioned beneath the first probe. A float switch is positioned adjacent the pump intake for providing a signal when the pump is immersed in liquid. The float switch and the probes are operatively connected to an AND gate circuit which generates a preselected signal when both probes are immersed in a nonconducting liquid. A time delay is operatively connected to the AND gate and begins a timing period responsive to the preselected signal. At the end of the timing period, the time delay provides a signal which energizes the pump. A latch circuit maintains the pump in an energized condition until both probes are again immersed in water.

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Pauls Valley, OK, United States of America

Denver K Kimberlin